Open AccessThree‐phase current injection method for mitigating turn‐to‐turn short‐circuit fault in concentrated‐winding permanent magnet aircraft starter generator
Author(s) -
Jiang Yunyi,
Zhang Zhuoran,
Jiang Wenying,
Geng Weiwei,
Huang Jian
Publication year - 2018
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2017.0754
Subject(s) - turn (biochemistry) , electromagnetic coil , engineering , magnet , fault (geology) , generator (circuit theory) , electrical engineering , rotor (electric) , permanent magnet synchronous generator , topology (electrical circuits) , power (physics) , control theory (sociology) , physics , computer science , control (management) , nuclear magnetic resonance , quantum mechanics , seismology , geology , artificial intelligence
Fractional‐slot concentrated‐winding (FSCW) permanent magnet synchronous machines, which are characterised with high power density, fault tolerance and wide constant‐power speed range, are gaining more and more attention in the aircraft starter generator (SG) systems. Nevertheless, the short‐circuit (SC) fault, especially the turn‐to‐turn SC fault, is the obstruct crux in aviation applications. This study is aimed to demonstrate the feasibility of FSCW permanent magnet SG (PMSG) in dealing with turn‐to‐turn SC fault. The law of FSCW‐PMSG SC fault is analysed and verified by finite‐element analysis (FEA), including the influence on turn‐to‐turn SC current by the number of the shorted turns and the coil position in the slot. The three‐phase current injection control is employed to mitigate the SC fault in PMSG when a turn‐to‐turn SC fault occurs. A 24‐slot, 16‐pole FSCW‐PMSG with spoke‐type rotor topology is designed to confirm the ability of inhibiting turn‐to‐turn SC current without the risk of irreversible demagnetisation. Both FEA and experimental results are presented, verifying the effectiveness of the three‐phase current injection control in restraining the turn‐to‐turn SC current for FSCW PMSG in an acceptable range.